A eirm composed



C. H1 NELSON.-

PUNCH PRESS.

APPLICATION 11150 1111113.11119.

Patented Oct. 21, 1919.

2 SHEETSSHEET l.

.C. R. NELSON.

PUNCH PRESS.

APPLICATION FILED JAN. I3. |919.

L ,3 l 9,411 Patented Oct. ZI, 1919.

2 SHEETS-SHEET 2.

UNITED STATES PATEN T OFFICE.H

CHARLES RUDOLPH NELSON, or CHICAGO, ILLINoIs. AssICNoR ro e. n. a w. A.NELSON,

or CHICAGO, ILLINOIS, A FIRM eoiurosnn WILBUR A. NELSON.

or snip CHARLS IeUnoLrH NELSON AND PUNCH-rieuse. Y

patent-ea Voet; 2,1, 1919.

Application led January 13, 1919. Serial No. 270,874.

To all whom it may concern:

Be it known that I, CHARLES RUDOLPH NELSON, a citizen of the UnitedStates, andy resident of Chicago, county of Cook, and

State of Illinois, have invented certain new and useful Improvements 1nPunch-Presses,

of which the following' is a specification,

and which are illustrated in the aecompanying drawings, forming a partthereof.

The invention relates to punch presses and especially to those having aplurality of removably and'adjustably held punches adapted forsimultaneous operation in a variety of different arrangements withlrespect to their number and spacing. It is well known Vthat in thepunching of sheets for use in some forms of loose leaf binders, as forexample, certain kinds of ledgers and transfer binders, a less number ofling apertures or notches is required in some of the sheets than inothers, although the spacing of the smaller number of apertures `must bethe same as Athe spacing of the corresponding apertures in the `sheetsprovided with the larger number. The invention accordingly contemplatesa punch vpress having aV series of removably held punches with provisionpermitting the removal or addition of punches intermediate the ends ofthe series without disturbing the spacing adjustment of those whichremain.

The object of the invention is `to provide an. improved -press forpunching paper sheets and the like, the feature of improvement residingin the manner in which the cooperating parts of the punch are held incorresponding parts of the' press.

In the accompanying' drawings Figure 1 is a front elevation of one formof punch press embodyingthe feature of improvement provided by theinvention;

Figs. 2 and 3 are detail perspective views, Fig. 2 showing one ofthepunches with some parts broken away and Fig. 3 showing an end portion ofthe cross head of the press;

Fig. 41 is a side' elevation of the punch press, partly in section, theplane of section being indicated by the line 4-4 on Fig. 1'; and

Fig. 5 is a detail plan sectional view taken on the line 5 5 of Fig. 1.

`The drawings show an upright punch press comprising a stationary tableV over which is mounted a vertically movable cross head 11. The crosshead 11 is guidedly held in a slideway 12 formed upon the end of anoif'erhanging bracket arm or standard 13 and a drive shaft 14 isjournaled in `the standard 13 over the said slideway.

Actuation ofthe cross head 11 is accomplished through a link 15 whichhas its vlower end pivotally connected to the cross head atl@ while theupper end of the link 15 is engaged with an eccentric 17 mounted on .thedrive shaft 1,1. Y

Inasmuch as the punching of a quantity of sheets with a variable numberof filing` apertures or notches at each.' downwar `thrust of thecrossrhead 11 is contemplated, a pluralityrof separate punches, as 18(Fig. 2) are preferably provided. As shown, each punch 18 is of wellknown construction and `comprises a die block, generallydesignated 19,and a plunger 20. The' die block 19 in turn comprises the base'21 havingthe die aperture 22 and the body portion 23 in which the plunger 20 isslidingly mounted, thebase 21 and .body portion23 heilig permanentlyconnected. ,The plunger is formed with the usual enlarged headj24. j pv,

During the Voperation of the press, the required number of the punches18 are y mountedtherein with the upper surface of the base portion 21 ofeach y gers 20 with the cross head 11 should serve for the positiveactuation ofthe plungers by the cross head in both directions and theinvention contemplates that this may be accomplished while neverthelesspermitting the separate removal of any of the punches 18 withoutdisturbing any of the others.

In the arrangement shown, all of the punches 1S are disposed in a row orseries for engagement with the sheets in a straight line adjacent oneedge of the same. Pref* erably the die block 19 of the several punchesare held upon the table 10 by separate clamps. As shown, the baseunember21 of each dieblock 19 is formed with chamfered ends 25, 26, and kthetable .10 is grooved to provide a the said base members, the forwardedge ofV depressed seat 27 for the groove being undercut to form anoverhanging shoulder 28 for engagement with the chamfered forward ends25 of vthebase members. Near the rear edge of the seat slot 29 forreceivin the head of a clamping bolt 30 by whici a separate 21 of eachdie block 19. several punches 18 -v plished by providing the said crosshead with a groove 32 upon its underside. This groove preferably extendscontinuously throughout the width of the cross head and the enlargedheads 24 of the plungers 2O enter the said groove in accordance with thelocation of the die blocks 19 upon the table 10.

Positive actuation of the plungers 20 dur- Y ing the upstrokes of thecross head 11 is accomplished by the use of plates 33, 34, whicnarecarried by the cross head and extend under the,I enlarged heads form ofa T parting to the groove 32 the as 34,'may be slot. One of the saidplates,

j permanently held in position against the l plate 33 is turned lugs,

' holding the plate 33 'Y Independent removal of any corresponding partof the cross by set screws 35.

head 11, as

of ,the punches 18 '1s permitted by the withdrawal of the plate 33 frombeneath the enlarged heads 24 of the plungers 20. For this purpose theplate'33 '1s preferably hingedly connected to the cross,head11. Asshown, the

,two ends of the plate 33 are upturned, as at 36 (Fig. 3) and each ofthese two end portions ofrthe plate'is pivotally attached to thecorresponding end of the plunger, as by a screw stud 37. Intermediateits ends the formed with a plurality of upas 38, V39, extending alongone The lugs 38 are norclamping bolts 40 for against swinging movement.Each of the lugs 39, on the other hand, is aperturedand is normallyengaged with a short stud 41 fixed in the adjacent face of the crosshead 11 to prevent downward deflection of the plate 33 intermediate itsends.

In some instances it may be desirable to punch some of the sheetsA to,be used in a loose leaf ledger with a series of four filing aperturesextending in a row along one edge of the .sheets while other sheets areto be of` the same.

edge

engaged with mally Copies of this patent may be obtained for fivepunched with only 24 of the plungersy from opposite sides of the same,thereby im cents each, by addressing the two apertures Vcorresponding inspacing with the two apertures at the ends of 'the row in the firstmentioned sheets. Vith the apparatus provided by the Y invention thepunching of both sets of sheets is readily accomplished for any of thepunches 18 may be inserted or'reinoved without disturbing the adjustmentof the others. For this purpose it is only necessary to withdraw theclamping bolts 40 to permit outward swingingof the plate 33 and adjustthe corresponding clamping bolts 30.

I yclaim as my invention 1. In a punch press, in combination, acooperating table and reciprocating cross head, the said cross headbeing formed with a T slot the throat of which faces the table and whichT slot extends continuously throughout the width of the cross head andthatl part of thel cross head which dconstitutes one of the side wallsof the throat of the T slot being movable to permit opening of the saidthroat, a plurality of separate punches each comprising a cooperatingdie block and plunger, the plunger of eachV punch being formed with anenlarged head adapted to enter the T slot of the cross head through itsthroat when open and to be held therein when ;the throat is closed, andseparate clamping means for removably attaching the die block of eachpunch to the table.

2. Ina punch press, in combination, a-

there being a slot in its bottom near its op-v posite side, boltsanchored and slidable in said slot, the die blocks increasing indimension toward their bases, the forward end of each being adapted tounderlie the forward edge of the groove, and members abutting againstthe rear edge of the groove and against the rear ends of the blocks andpressed against each by nuts von said bolts.

3. In a punch press, in combination, a table havingy a groove, the frontedge of which is under cut, there being a slot inv thel bottom of thegroovenear its rear edge, a bolt longitudinallyslidable and anchored insaid slot, a die block decreasing in length from its bottom upwardly,its front end adapted to underlie the front edge Of the groove, clampingmeans having an opening to receive said bolt and adapted tov abutagainst the rear edge of the groove and against the rear end of thel dieblock and a nut on said bolt.

HARLES RUDOLPH NELSON.

Commissioner of Patents,

Washington, D. C.

